Patent GB-336307-A (GB)
Title: Improvements in or relating to the performing of channelling, edge-thickness reducing or like operations on boot or shoe soles
IPC: A43D43/02
Filed: 1929-07-16
Abstract: 336,307. British United Shoe Machinery Co., Ltd., and Ricks, F. July 16, 1929. Stationary-cutter machines.-In a machine for channelling a sole with an American channel at the waist and an English channel at the forepart, a feed roll 5 is carried on a fixed framing and is geared to a presser roll 15 on a pivoted head. The head carries a stem 21 with arcuate guide 27 carrying an adjustable slide 29 secured in position by bolts. On the slide 29 a slider 55 is movable by a treadle-operated ball-crank 67. The slide 29 carries a knife 30 for cutting an American channel and the slider 55 carries an English channel knife 56. In operation, the American channel is cut at the waist bv the edge AB of the knife 56 and the part DE of the knife 30. The thick portion of the knife 56 lifts the channel lip. When the forepart is reached the treadle is depressed and the knife 56 is moved to the left Fig. 2, to mask the knife 30 and the knife 56 cuts an English channel while the knife 30 tracks idly behind the knife 56. The treadle is released and the two knives coact to cut an American channel at the opposite waist. A work gauge may be moved by the knife treadle to deepen the American channel. To prevent the grooving knife cutting into the channel flap the elliptical cutting edge of the groover 81, Fig. 3<b>, is bevelled so that the lower part of the edge first meets the work and the groover tube is thickened on top. In a modification the sole is channelled at the waist and the fore part by the knife 56, Fig. 1, and then in a separate machine the channel at the waist is deepened to form an American channel. As shown in Fig. 4, the sole is supported by feed wheels 5 and a small idle supporting roll 101 and the sole is pressed by presser roll 15 and presser 10. A channelling knife 111 is vertically adjustable by a screw 117 in a head 115 slidable in a hinged arm 9 against a spring 123 by a treadle chain 129. Stops 125, 139 limit the movement. To bevel the lower margin of the sole a bevelling knife 187, Fig. 7, not shown, is swung about a rod against spring pressure by a hook-ended rod 195 slidable in the arm 9. As the arm 9 moves in accordance with the work thickness the angle of the feathering knife is altered slightly. On a pin 211 on the arm 9 is a three-armed lever 213; one arm is connected to a chain 223, one coacts with a rod 195 and an adjusting screw 217 is carried by the third. In operation, a sole previously channelled in the foot part and waist is fed against the edge guide 7. The knife 111 deepens the channel at the waist and the feathering knife removes a skiving from the under surface. On depression of a treadle-rod 155 by an out of balance floating lever arrangement, the chains 233, 129 are pulled successively to reduce the angle of the feathering knife and to retract the knife 111. When the end of the forepart is reached the treadle is released and the knife 111 again comes into action and the feathering knife is tipped. Specifications 315,812, 322,198, and 322,451 are referred to.